When you are in real danger, you should find a way to contact a policeman as soon as possible. How to use the app: 1. Select one of the four alarm sound effects - police siren, dog barking, car alarm, alarm ring. 2. Press and hold the big red button for 3 secs to start alarming. (Be careful, the sound effects are really loud!!) 3. If you need to, just click the big red button again to stop the alarm. It is that simple. Install this app then your iPhone will be turn into a portable alarm device that will scare away the dangers. Love this app? Please spread the word to your friends and families, and leave us a review if you have any suggestions!